Build your pizzeria website in Newport
Newport has Cardiff twenty minutes down the line and Bristol forty minutes over the bridge, and both of them spend heavily on telling people they are worth the trip. The job of a pizzeria website here is not to compete with those cities. It is to give somebody a concrete reason to eat where they already live.
Specific beats general, always
Nobody gets the train to Cardiff for an average pizza. They go because they have a name in their head and a picture of what they will get. That is achievable at home, on one page, if the page says something real: the type of oven, how long the dough proves, which farm the cheese comes from, whether the sourdough starter is older than the shop.
The upside of being in a smaller market is that this works faster here. The local listings are short enough that one well-run independent with a proper page and an honest set of reviews is genuinely visible, rather than sitting forty places down a city-sized list.
Welsh, if it is yours
Search in this corner of Gwent happens in English, so a Welsh version is not an SEO decision. It is an identity decision. If you use Welsh in the shop, on the sign or with your staff, putting it on the menu tells a customer something true about the place they are ordering from — and that is exactly the kind of detail that a chain up the road cannot reproduce.
Keep the second order
A city this size runs on repeat custom, not on discovery. Paying a marketplace to introduce you to somebody new is a reasonable trade; paying it every Friday for the same family in Rogerstone is not. Your own ordering page costs the same whether you take ten orders through it or a thousand, and every one of them arrives whole.